Messages in this thread | | | Subject | Unable to handle kernel paging request in 2.6.16-rc1-mm4 | From | Lee Schermerhorn <> | Date | Wed, 01 Feb 2006 10:20:07 -0500 |
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Just a "heads up" because I haven't found reference to this in the ia64 nor kernel lists. Maybe just happens on my platform?
I'm seeing this on an HP rx8620 [16xIA64, 4 NUMA nodes, 32GB], booting subject kernel. Log excerpts: --- Unable to handle kernel paging request at virtual address a004037b4dc28110 events/12[62]: Oops 11012296146944 [1] <snip> Call Trace: <snip> [<a00000010000cca0>] ia64_leave_kernel+0x0/0x280 sp=e0000721fe84fb80 bsp=e0000721fe849290 [<a0000001001483b0>] free_block+0x90/0x360 sp=e0000721fe84fd50 bsp=e0000721fe849200 [<a0000001001489d0>] drain_array_locked+0x110/0x180 sp=e0000721fe84fd50 bsp=e0000721fe8491b8 [<a00000010014e6c0>] cache_reap+0x1a0/0x600 sp=e0000721fe84fd50 bsp=e0000721fe849140 [<a0000001000c61c0>] run_workqueue+0x180/0x2c0 sp=e0000721fe84fd60 bsp=e0000721fe8490f0 [<a0000001000c6540>] worker_thread+0x240/0x2c0 sp=e0000721fe84fd60 bsp=e0000721fe8490b8 <snip> BUG: events/12/62, lock held at task exit time! [a000000100867fe0] {cache_chain_mutex} .. held by: events/12: 62 [e0000721fe848000, 110] ... acquired at: cache_reap+0x30/0x600 --- Eventually the boot hangs...
I did a bisection search of the mm4 broken out patches and isolated the problem to the "export-cpu-topology-by-sysfs" patches. I.e., if I comment these out, builds and boots fine [with a one-liner build fix from Christoph Lameter for an SGI sn pci source file]. Something overstepping a slab allocation? Still investigating.
Regards, Lee
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